In the Solow Model, Defining $\bar { s }$ As the Saving Rate, Y_t as Output, and C_t as the Saving

In the Solow model, defining $\bar { s }$ as the saving rate, Y_t as output, and C_t as consumption, investment I_t is given by:

A) $I _ { t } = ( 1 - \bar { s } )$
B) $I _ { t } = \bar { s } Y _ { t }$
C) $I _ { t } = ( 1 - \bar { s } ) C _ { t }$
D) $I _ { t } = \bar { s } Y _ { t } - C _ { t }$
E) $l _ { t } = ( 1 - \bar { s } ) Y _ { t }$